Manufacture of artificial silk and the like



Nov. 4, 1930.

w. P. DEAPER MANUFACTURE OF ARTIFICIAL SILK AND THE LIKE Filed Jan.

Patented Nov. 4, 1930 OFFICE WILLIAM PORTER DREAIPER, 0F HAMPSTEADHEATH, ENGLAND MANUFACTURE iDF ARTIFICIAL SILK AND THE LIKE Applicationfiled January 3, 1927, Serial No. 158,838,'and in Great Britain January11, i926.

In the ordinary operations of Wet spinningfind it more advantageous toWork in the folt5 lowing manner, so producing mostly a twisted fibrewhich is collected in a centritugalbox, and alternately during theperiod of dotling the thread is transferred by hand to a reel or bobbin,being led thereto through a traco versing guide so as to collect anuntwisted thread suitable for cutting up into staple fibre, or which maybe subsequently twisted up into an artificial sill: yarn.

Somewhere on the spinning frame, on fi which the jets, centrifugalboxes, and precipating bath are located, I suitably attach or fix aconveniently sized collecting reel or bobbin or a number of them,working with a transverse guider before'each reel or bobbin at whichtravels and spreads the yarn on the same When this is collected in themanner to be described. At the end of the required time spinning intothe centrifugal box, the yarn flowing into the same is broken at aselected at and convenient place and the end leading from the jet is atonce led along the bath, or over suitable guiders to a collecting reelor bobbin and is wound on tothe same at a suitable and pro-determinedrate. This opera tion is continued While the centrifugal box containingthe collected material is replaced by a fresh one, and is ready toreceive a strand of filaments. The strand is again broken andimmediately led to the godet and then down at to the tunnel guider inthe normal manner,

and ordinary centrifugal spinning is resumed.

By Working on this double type of spinning machine spinning operationsbecome practit l cally continuous. This greatly facilitates the smoothworking of the jet and prevents Waste of solution, and consequently anincreased output of filaments is obtained. This extra material spun ontothe skein reel or bobbin may be subsequently treated in any desiredmanner so that either artificial silk or staple fibre is obtained fromthe same as desired.

One reel or bobbin may be utilized to collect the strands of filamentsfrom more than one jet whilechanging operations are in progress, whenthe product is to be staple fibre, or when a relatively coarse yarn isdesired. The rate of winding onto the skein holder or bobbin may also bethe same as that utilized for spinning into the centrifugal boxes, or itmay be varied when this is desired. A convenient position for the saidreel or bobbin, especially when more, than one strand is collected onthe same is at the end of the precipitating bath, especially or theprecipitating bath, the transverse guider which is preferably used tosuitably spread or distribute the yarn on the bobbin or reel being alsosuitably mounted on the same end and suitably shaped guiders may beplaced at suitable intervals along the pre cipitating bath, or along asection of it, when this is too long for collecting the filaments inthis Way or for convenient working. The surplus solution from thefilaments may drain back into the precipitating bath or be collectedseparately. '{llr even the reel or bobbin may be made to rotateconveniently in a separate bath or solution.

The accompanying drawing illustrates diagrammatically the apparatus forcarryfine not the invention.

The strand of filaments l issuing from the jet 2 in the precipitatingbath 3 pass over a strand guider t and godet 531 into the centri'fu galbox 6.

When the centrifugal box 6 with its reciprocating funnel guider isfilled and Whilst it is being; replaced by a trash one, the strand offilaments l is broken at any convenient place and the free end attachedto the 2 is then temporarily led through a transverse guider 8 on to theskein-holder 7111s shown in dotted linesin the drawing thus giving aprocess of continuous spinning during the time of doifing thecentrifugal box.

Any desired len h of immersionin the spinning bath may arranged by theaid of the said guiders and where the strand or strands of filaments aremade to pass over the godeton their way to the secondary reel or bobbinsuitable arrangements are made to efiect this. This process ofcontinuous spinning is facilitated when the precipitating so lution oranother suitable solution is passed down the funnel guider as then amore rapid and regular restarting of spinning operations can beeffected. r

' .I claim:

1. In combination with a centrifugal box for spinning artificial silk,an apparatus for practically continuous spinning comprising a skeinwinder for receiving the strand of filaments during the time of chan 'ngthe centrifugal boxes, said strand of aments' attached to the jet beingled onto the said skein winder.

2. In combination with a centrifugal box for spinning artificial silk,an apparatus for practically continuous spinning comprising a skeinwinder for receiving the strand of filainents during the time of changinof the centrifugal boxes, said strand of filaments broken and the freeend attached to the jet being led by hand to the skein winder and atransverse guider associated with each winder spreading the strand offilaments collected thereon.

In testimon whereof I afiix my signature. WILL M PORTER DREAPER.

